Research On Sulfonic Phthalocyanine Copper/polypyrrole Flexible Composite Fabric Gas Sensor

With the increasing industrialization of our country,the problem of air pollution is becoming more and more serious.The toxic and harmful gases in the atmosphere have caused great harm to people's health.In addition,the toxic gas produced by industrial production is a huge potential safety hazard.It is very important to ensure that the concentration of toxic and harmful gases conforms to the requirements of safety in production and promptly reduce the harm to the human body.In this context,the gas sensor as a gas-sensitive element in the detection of toxic and harmful gases has been a tremendous development.However,the current kinds of gas sensors are difficult to meet the needs of social development in terms of portability or sensitivity.With the continuous promotion of research,the development of gas sensors shows a diversified and multi-disciplinary trend.In recent years,the combination of gas sensors and textiles has become a hot research topic in the field of textile frontier technology.Therefore,it is of great significance to study a gas sensor based on fabric flexible structure to detect toxic gases in industrial production for the development and industrialization of smart textiles.In this paper,polypyrrole(PPy)modified by ammonia plasma and CuTsPc(copper phthalocyanine tetraphenylsulfonate)synthesized by "template method"were used as main raw materials.CuTsPc-PPy composite gas-sensitive materials were prepared by the reaction of Dicyclohexylcarbodiimide(DCC)and methylaminopyridine(DMAP)catalyzed sulfonamide condensation reaction.And based on this new type of gas-sensitive material,we used the screen printing method to combine it with woven plain weave to fabricate a fabric-type gas sensor.The results showed that there were obvious etching marks on the surface of polypyrrole after ammonia plasma treatment and the amino groups were successfully introduced.The synthesized CuTsPc-PPy composite material had excellent performance in gas sensitivity test,and advantages of the p-p type semiconductor gas sensitive material were fully utilized,at room temperature 25? 50ppm ammonia response time of only 5s,the sensitivity of 1.52,CuPc and PPy increased by 12.5%and 33.7%;in the fabric-based gas sensor testing,screen printing the four-layer sensor showed the best performance,and there was room for improvement in the fastness of the fabric to the wash-resistant test surface.The research of this paper proves that the new CuTsPc-PPy composites have good gas sensitivity,and the gas sensor based on gas sensors can provide references for the design and development of smart textiles and flexible sensors.